Merge branch '15430-fts-operator-removal' into main. Closes #15430

Arvados-DCO-1.1-Signed-off-by: Lucas Di Pentima <lucas.dipentima@curii.com>

diff --combined doc/admin/upgrading.html.textile.liquid
index 8435e2871f882fd6588b709711182443dcc8f2f3,d3afec8fc52a7b5e6a7a94a84dbc973902d9c40c..9e7410260f8955ea35f1d6e4790e792feb1c670f
--- 1/doc/admin/upgrading.html.textile.liquid
--- 2/doc/admin/upgrading.html.textile.liquid
+++ b/doc/admin/upgrading.html.textile.liquid
@@@ -39,6 -39,10 +39,10 @@@ h2(#main). development main (as of 2021
  
  "Upgrading from 2.2.0":#v2_2_0
  
+ h3. Removed deprecated '@@' search operator
+ 
+ The '@@' full text search operator, previously deprecated, has been removed. To perform a string search across multiple columns, use the 'ilike' operator on 'any' column as described in the "available list method filter section":{{site.baseurl}}/api/methods.html#substringsearchfilter of the API documentation.
+ 
  h3. Storage classes must be defined explicitly
  
  If your configuration uses the StorageClasses attribute on any Keep volumes, you must add a new @StorageClasses@ section that lists all of your storage classes. Refer to the updated documentation about "configuring storage classes":{{site.baseurl}}/admin/storage-classes.html for details.
@@@ -51,14 -55,14 +55,14 @@@ h3. crunch-dispatch-local now requires 
  
  The @crunch-dispatch-local@ dispatcher now reads the API host and token from the system wide @/etc/arvados/config.yml@ .  It will fail to start that file is not found or not readable.
  
 -h2(#v2_2_0). v2.2.0 (2021-06-03)
 -
 -"Upgrading from 2.1.0":#v2_1_0
 -
  h3. Multi-file docker image collections
  
  Typically a docker image collection contains a single @.tar@ file at the top level. Handling of atypical cases has changed. If a docker image collection contains files with extensions other than @.tar@, they will be ignored (previously they could cause errors). If a docker image collection contains multiple @.tar@ files, it will cause an error at runtime, "cannot choose from multiple tar files in image collection" (previously one of the @.tar@ files was selected). Subdirectories are ignored. The @arv keep docker@ command always creates a collection with a single @.tar@ file, and never uses subdirectories, so this change will not affect most users.
  
 +h2(#v2_2_0). v2.2.0 (2021-06-03)
 +
 +"Upgrading from 2.1.0":#v2_1_0
 +
  h3. New spelling of S3 credential configs
  
  If you use the S3 driver for Keep volumes and specify credentials in your configuration file (as opposed to using an IAM role), you should change the spelling of the @AccessKey@ and @SecretKey@ config keys to @AccessKeyID@ and @SecretAccessKey@. If you don't update them, the previous spellings will still be accepted, but warnings will be logged at server startup.